Florida Electrical Contractor Licensing
Exam Practice Questions and Correct
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Rationales 2027 Q&A | Instant
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1. General Theory and Electrical Principles
1. What is the primary function of electrical resistance in a circuit?
A. To increase the available voltage
B. To oppose the flow of electric current
C. To create additional electrical energy
D. To convert AC into DC
Correct Answer: B. To oppose the flow of electric current
Rationale: Electrical resistance opposes the movement of electric charge through a
circuit. Under Ohm’s law, resistance affects the amount of current that flows for a
given applied voltage.
2. A 120-volt circuit has a resistance of 20 ohms. What current flows through the
circuit?
A. 6 amperes
B. 12 amperes
C. 0.17 amperes
D. 2 amperes
Correct Answer: A. 6 amperes
Rationale: Ohm’s law states that current equals voltage divided by resistance.
Therefore, I = 120 ÷ 20 = 6 amperes.
,3. In an AC circuit, inductive reactance primarily opposes which quantity?
A. Resistance
B. Capacitance
C. Alternating current
D. Direct current only
Correct Answer: C. Alternating current
Rationale: Inductive reactance is the opposition that inductors present to
alternating current. It increases with frequency and inductance.
4. What happens to current in a series circuit if the total resistance increases
while the applied voltage remains constant?
A. Current increases
B. Current remains unchanged
C. Current becomes zero immediately
D. Current decreases
Correct Answer: D. Current decreases
Rationale: According to Ohm’s law, current equals voltage divided by resistance.
With voltage held constant, increasing total resistance reduces circuit current.
5. What is the purpose of a transformer in an electrical distribution system?
A. To change AC voltage from one level to another
B. To convert electrical energy directly into mechanical energy
C. To eliminate all circuit resistance
D. To change DC voltage into mechanical power
Correct Answer: A. To change AC voltage from one level to another
Rationale: A transformer transfers electrical energy between windings through
electromagnetic induction and can step AC voltage up or down.
,2. Plan and Specification Reading and Interpretation
6. On an electrical plan, a single-pole switch symbol generally identifies a device
used to control what?
A. A grounding electrode
B. A single lighting or other connected load from one location
C. A transformer secondary
D. A feeder overcurrent device
Correct Answer: B. A single lighting or other connected load from one location
Rationale: A single-pole switch is commonly used to control a load from one
location. The electrical plan identifies its relationship to the controlled lighting or
equipment.
7. When an electrical plan contains a circuit designation such as “L1-20A,” what
information should the electrician verify from the plan legend and schedules?
A. The building's fire-resistance rating
B. The transformer manufacturer's warranty
C. The circuit identification and associated equipment requirements
D. The property owner's insurance limits
Correct Answer: C. The circuit identification and associated equipment
requirements
Rationale: Circuit designations on plans must be interpreted together with
schedules, legends, and notes so the installer can identify the intended circuit and
equipment connections.
3. Wiring and Protection
8. What is the primary purpose of an overcurrent protective device?
A. To increase conductor ampacity
B. To stabilize line frequency
, C. To protect conductors from excessive current
D. To eliminate voltage drop
Correct Answer: C. To protect conductors from excessive current
Rationale: Overcurrent protective devices such as fuses and circuit breakers are
intended to open a circuit when excessive current could damage conductors or
create a hazard.
9. A continuous load is generally calculated at what percentage of the load for
conductor and overcurrent protection sizing when the NEC requires the
standard continuous-load treatment?
A. 80%
B. 100%
C. 110%
D. 125%
Correct Answer: D. 125%
Rationale: A continuous load is generally calculated at 125% of its actual load
when applying the NEC's standard sizing requirements. This accounts for the
expected extended duration of the load.
10. What is the primary purpose of a ground-fault circuit interrupter (GFCI)?
A. To protect people from electric shock caused by ground-fault current
B. To increase the available fault current
C. To provide motor overload protection
D. To regulate circuit voltage
Correct Answer: A. To protect people from electric shock caused by ground-fault
current
Rationale: A GFCI monitors current balance and opens the circuit when it detects a
difference indicating current may be flowing through an unintended path, such as
a person.
Exam Practice Questions and Correct
Answers (Verified Answers) Plus
Rationales 2027 Q&A | Instant
Download Pdf
1. General Theory and Electrical Principles
1. What is the primary function of electrical resistance in a circuit?
A. To increase the available voltage
B. To oppose the flow of electric current
C. To create additional electrical energy
D. To convert AC into DC
Correct Answer: B. To oppose the flow of electric current
Rationale: Electrical resistance opposes the movement of electric charge through a
circuit. Under Ohm’s law, resistance affects the amount of current that flows for a
given applied voltage.
2. A 120-volt circuit has a resistance of 20 ohms. What current flows through the
circuit?
A. 6 amperes
B. 12 amperes
C. 0.17 amperes
D. 2 amperes
Correct Answer: A. 6 amperes
Rationale: Ohm’s law states that current equals voltage divided by resistance.
Therefore, I = 120 ÷ 20 = 6 amperes.
,3. In an AC circuit, inductive reactance primarily opposes which quantity?
A. Resistance
B. Capacitance
C. Alternating current
D. Direct current only
Correct Answer: C. Alternating current
Rationale: Inductive reactance is the opposition that inductors present to
alternating current. It increases with frequency and inductance.
4. What happens to current in a series circuit if the total resistance increases
while the applied voltage remains constant?
A. Current increases
B. Current remains unchanged
C. Current becomes zero immediately
D. Current decreases
Correct Answer: D. Current decreases
Rationale: According to Ohm’s law, current equals voltage divided by resistance.
With voltage held constant, increasing total resistance reduces circuit current.
5. What is the purpose of a transformer in an electrical distribution system?
A. To change AC voltage from one level to another
B. To convert electrical energy directly into mechanical energy
C. To eliminate all circuit resistance
D. To change DC voltage into mechanical power
Correct Answer: A. To change AC voltage from one level to another
Rationale: A transformer transfers electrical energy between windings through
electromagnetic induction and can step AC voltage up or down.
,2. Plan and Specification Reading and Interpretation
6. On an electrical plan, a single-pole switch symbol generally identifies a device
used to control what?
A. A grounding electrode
B. A single lighting or other connected load from one location
C. A transformer secondary
D. A feeder overcurrent device
Correct Answer: B. A single lighting or other connected load from one location
Rationale: A single-pole switch is commonly used to control a load from one
location. The electrical plan identifies its relationship to the controlled lighting or
equipment.
7. When an electrical plan contains a circuit designation such as “L1-20A,” what
information should the electrician verify from the plan legend and schedules?
A. The building's fire-resistance rating
B. The transformer manufacturer's warranty
C. The circuit identification and associated equipment requirements
D. The property owner's insurance limits
Correct Answer: C. The circuit identification and associated equipment
requirements
Rationale: Circuit designations on plans must be interpreted together with
schedules, legends, and notes so the installer can identify the intended circuit and
equipment connections.
3. Wiring and Protection
8. What is the primary purpose of an overcurrent protective device?
A. To increase conductor ampacity
B. To stabilize line frequency
, C. To protect conductors from excessive current
D. To eliminate voltage drop
Correct Answer: C. To protect conductors from excessive current
Rationale: Overcurrent protective devices such as fuses and circuit breakers are
intended to open a circuit when excessive current could damage conductors or
create a hazard.
9. A continuous load is generally calculated at what percentage of the load for
conductor and overcurrent protection sizing when the NEC requires the
standard continuous-load treatment?
A. 80%
B. 100%
C. 110%
D. 125%
Correct Answer: D. 125%
Rationale: A continuous load is generally calculated at 125% of its actual load
when applying the NEC's standard sizing requirements. This accounts for the
expected extended duration of the load.
10. What is the primary purpose of a ground-fault circuit interrupter (GFCI)?
A. To protect people from electric shock caused by ground-fault current
B. To increase the available fault current
C. To provide motor overload protection
D. To regulate circuit voltage
Correct Answer: A. To protect people from electric shock caused by ground-fault
current
Rationale: A GFCI monitors current balance and opens the circuit when it detects a
difference indicating current may be flowing through an unintended path, such as
a person.
